Title :
PD activity and ageing of power-electronics controlled motors
Author :
Montanari, G.C. ; Cavallini, A. ; Caprara, A.
Author_Institution :
DIE-LIMAT, Bologna Univ., Italy
Abstract :
This paper shows results of aging tests having the purpose to investigate the effect of power electronics supply waveforms on the reliability of low-voltage wire-wound asynchronous motors. Partial discharge phenomena were incepted in low power motors by connecting them to a commercial PWM inverter through a cable long enough to generate overshoot in the supply voltage. Partial discharge activity was monitored online and offline at pre-selected times. The results show that partial discharge activity is able to bring motors to breakdown in very short time and that partial discharge magnitude and repetition rate can be used as aging markers to infer insulation condition.
Keywords :
PWM invertors; ageing; computerised monitoring; induction motors; machine control; machine insulation; partial discharges; reliability; PWM inverter; insulation condition; low-voltage wire-wound asynchronous motors reliability; online monitoring; partial discharge phenomena; power electronics supply waveforms; power-electronics controlled motors ageing; Aging; Electric breakdown; Electronic equipment testing; Joining processes; Partial discharges; Power electronics; Power generation; Power supplies; Pulse width modulation inverters; Voltage;
Conference_Titel :
Electrical Insulating Materials, 2005. (ISEIM 2005). Proceedings of 2005 International Symposium on
Conference_Location :
Kitakyushu
Print_ISBN :
4-88686-063-X
DOI :
10.1109/ISEIM.2005.193363
